Implementation of binary search with loop

binary-search.cpp

int search(vector<int> &nums, int target) {
    // Write your code here.

    int start =0;
    int end = nums.size()-1;
    int mid = start+(end-start)/2;

    while(start<=end){
        if(nums[mid]==target)
        return mid;

        else if(target<nums[mid])
        end = mid-1;

        else 
        start = mid + 1;

        mid = start+(end-start)/2;
    }
    return -1;
}